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Well, I tried to run the pkg file from /Library/Updates/ that said there was an error and can't complete the installation...Then I noticed the appstore isn't loading up anything just the empty grey background with the MAS logo. Then I tried to logout, it loggedout to full empty grey screen then my desktop loaded up again on by it's own without going to the login screen lol. After that I rebooted and now kernelpanic on bootscreen. F*ck. XD
I think I'll just wait for DP4 or final and do a clean install...

I'm talking about these two:
Btw I have macpro3,1 smbios and I still get the black boot screen... Why is that happening if it's checks the board id? I have the proper macpro3,1 board-id (Mac-F42C88C8) injected into smbios.

You have two same "built-in" there... is that necessary? Btw do you have idea what exactly helped? The connector-type? Or the built-in? Or the name? If you remove anything from there, then you lose the apple logo?

Tried it, caused blank screen with "too big" text by the display itself. I think it mean the resolution is too much. But I patched the bios to 1920x1080 and my displays optimal resolution is 1920x1080. So I don't get what is the problem... I achieved the same effect with chameleon and "resolution" module. Display said "too big".

@Wayang-NT: Thanks for your tests! Could you attach your FakeSMC.kext here? Then we could test it if it's making any difference. ***
boot with meter=0 boot-arg and you will get the spinner instead of the progress bar.